I’ve never had a 20x14, so I can’t comment on it. I’ve loved the 20x16s I’ve owned previously though.
As far as 18” drums go, in some ways I’ve found 18x16 drums preferable in sound over 18x14 drums. But the shell make-up and mount fittings between the different drums I’ve used are completely different, and so it’s hard to tell with any real accuracy. My personal feeling is that the 18x14 is preferable for lugging and setting up because of its smaller size, and I predict that an 18x14 drum with the same shell make-up, heads, tuning, and mount fittings would be more or less indistinguishable from an 18x16 in a blindfold test. Both sound really cool anyway and I’d recommend going with the one you *like* more than the other. Hope this helps, Arne, and good luck. Love to know what you end up with
P.S. I was noticing as I typed (or tapped) this that I even love typing/tapping and reading the numbers in my preferred sizes. Very difficult to describe, but there’s a real satisfaction in processing the numbers. Do you get that too?!